Here at Google Sightseeing we’re fond of the excesses that are common in the oil-rich city of Dubai.1 Before the recent recession, money flowed so freely that even utilitarian structures were built larger than anywhere else on the planet. One example is Terminal 3 at Dubai International Airport – the world’s largest airport terminal. At more than a million square metres, this was – for a time – the largest building in the world by floor space2, though I suspect that even in this vast terminal it is probably impossible – like airports everywhere – to get a…